| Acronym | Definition |
|---|
| ICAS | Institute of Chartered Accountants of Scotland |
| ICAS | International Conference on Autonomic and Autonomous Systems |
| ICAS | Independent Complaints Advocacy Service (UK NHS) |
| ICAS | International Council of the Aeronautical Sciences |
| ICAS | International Committee against Stoning (human rights organization) |
| ICAS | Integrated Condition Assessment System |
| ICAS | International Council of Arbitration for Sport |
| ICAS | International Council of Airshows |
| ICAS | Individual Capital Adequacy Standards |
| ICAS | Institutul de Cercetari si Amenajari Silvice |
| ICAS | Intel Communicating Applications Specifications |
| ICAS | Intersegmental Committee of Academic Senates |
| ICAS | Interacademic Commission for Alpine Studies |
| ICAS | Intermittent Commercial and Amateur Service (tubing industry) |
| ICAS | Institute for Critical Animal Studies |
| ICAS | Interdepartmental Committee for Atmospheric Sciences |
| ICAS | Independent Counseling and Advisory Services |
| ICAS | Individual Chemical Alarm System |
| ICAS | Integrated Chronological Applications System (uniform scales of calendar and clock) |
| ICAS | Indication, Control & Alarm System |
| ICAS | Interagency Committee for Atmospheric Science |
| ICAS | Immaculate Conception Apostolic School (Center Harbor, NH) |
| ICAS | Infrared Countermeasures Assessment System |
| ICAS | Image Capture & Analysis System |
| ICAS | Integrated Cost and Scheduling |
| ICAS | International Communications Application Specification |
| ICAS | Integrated Combat Assessment System |
| ICAS | Internal Corrective Action System |
| ICAS | Internal Compliance and Assessment System |
| ICAS | International Cell Assisted Surgery Congress (conference) |
| ICAS | International Convention of Asia Scholars (est. 1997) |
| ICAS | Island Culture Archival Support (San Marcos, CA) |